Global Patent Index - EP 0081657 A3

EP 0081657 A3 19841003 - INK JET PRINTERS AND METHODS OF OPERATING INK JET PRINTERS

Title (en)

INK JET PRINTERS AND METHODS OF OPERATING INK JET PRINTERS

Publication

EP 0081657 A3 19841003 (EN)

Application

EP 82109611 A 19821018

Priority

US 33029981 A 19811214

Abstract (en)

[origin: EP0081657A2] An ink jet printer is disclosed having an arrangement for selectively erasing error markings. Printing and erasure is effected on a paper sheet (20) at a station (11). Erasure is achieved by rotating a three armed carrier unit (56) about its mounting shaft (54) by a drive from gear shaft (62). The arm (64) of the unit comprises a heater and while the heater is at the station 11 the printing to be erased is warmed. Thereafter the arm (66) is brought to the station (11) and an erasure wick carrying erasure liquid wets the warmed printing with the liquid. This bleaches the printing out by a chemical reaction. Subsequently the arm (68) is brought to the station 11 and a neutralizer wick carrying a neutralizer liquid wets the area with the liquid. The ink may contain an azo dye e.g. Direct Black (19) dye and the erasure liquid may comprise a reducing liquid e.g. a saturated solution of sodium dithionate (Na2S2O4) in 96% aqueous hydrazine.

IPC 1-7

B41J 29/26; C09D 11/00

IPC 8 full level

B41J 2/01 (2006.01); B41J 29/26 (2006.01); B41J 29/36 (2006.01); C09D 11/00 (2006.01)

CPC (source: EP US)

B41J 29/26 (2013.01 - EP US); C09D 11/50 (2013.01 - EP US)

Citation (search report)

  • [Y] US 4156657 A 19790529 - LIN AN-CHUNG R [US]
  • [A] US 4108960 A 19780822 - LEIGH ROLAND ALBERT
  • [A] DE 2505077 A1 19760819 - PELIKAN WERKE WAGNER GUENTHER
  • [Y] PATENTS ABSTRACTS OF JAPAN, vol. 5, no. 166 (M-93)[838], 23rd October 1981; & JP - A - 56 93 560 (DAINI SEIKOSHA K.K.) 29-07-1981
  • [A] PATENT ABSTRACTS OF JAPAN, vol. 5, no. 98 (C-60)[770], 25th June 1981; & JP - A - 56 41 275 (TOYO INK SEIZO K.K.) 17-04-1981
  • [A] IBM TECHNICAL DISCLOSURE BULLETIN, vol. 21, no. 3, August 1978, pages 1111-1112, Armonk, US; L.M. COOPER: "Single line correctable display for ink jet printer"

Designated contracting state (EPC)

DE FR GB IT

DOCDB simple family (publication)

EP 0081657 A2 19830622; EP 0081657 A3 19841003; EP 0081657 B1 19870304; CA 1174266 A 19840911; DE 3275520 D1 19870409; JP S58102773 A 19830618; JP S632787 B2 19880120; US 4413266 A 19831101

DOCDB simple family (application)

EP 82109611 A 19821018; CA 414992 A 19821105; DE 3275520 T 19821018; JP 17861782 A 19821013; US 33029981 A 19811214